Socket programming server and client code

// Server socket <SPAN class = 'wp _ keywordlink '> Program </span> creates a main program to receive messages from the client. <br/> Public void serversocket () <br/> {<br/> socket listener = new socket (addressfamily. interNetwork, sockettype. stream, protocoltype. TCP); // (1) first define a socket on the server and use the TCP protocol <br/> listener. BIND (New ipendpoint (IPaddress. any, 2112); // (2) set the binding IP address of the socket and accept the message sent from any IP address to port 2112. <br/> listener. listen (100); // (3) set the socket to the listening status and set the listening queue to 100 <br /> While (true) // infinite loop, that is, messages are always accepted without exception interruption <br/>{< br/> string receiverallstr = string. empty; <br/> Socket socket = listener. accept (); // (4) create a new socket for a newly created connection <br/> while (true) <br/> {<br/> byte [] receivebytes = new byte [1024]; <br/> int numbytes = socket. receive (receivebytes); // (5) receives messages from the socket and writes the received messages to the defined byte array. <br/> string receivestr = encoding. ASCII. getstring (R Eceivebytes, 0, numbytes); <br/> receiverallstr + = receivestr; <br/> If (receivestr. indexof ("[Final]")>-1) <br/>{< br/> console. writeline (receiverallstr); <br/> break; <br/>}< br/> string replysuccess = "the data can be successfullly received! "; // Not required <br/> byte [] bytestr = encoding. ASCII. getbytes (replysuccess); // optional <br/> socket. send (bytestr); // not required. Send a successful response to send data to connected system to the client. net. sockets. socket <br/> socket. shutdown (socketshutdown. both); // (6) disables sends and ES on a system. net. sockets. socket <br/> socket. close (); // (7) Close the socket connection, release all occupied resources, and continue to accept other messages in an endless loop <br/>}< br/> listener. close (); // close system. net. Sockets. socket Connection and release all associated resources. <br/> console. read (); <br/>}< br/> // create a main program to run the sending program. <br/> Public void clientsocket () <br/> {<br/> socket sender = new socket (addressfamily. interNetwork, sockettype. stream, protocoltype. TCP); // (1) first define a socket on the server and use the TCP protocol <br/> iphostentry iphost = DNS. resolve ("127.0.0.1"); <br/> IPaddress = iphost. addressl Ist [0]; <br/> ipendpoint = new ipendpoint (IPaddress, 2112); <br/> sender. connect (ipendpoint); // (2) set the link IP address of the socket and send it to port 2112 of the specified IP address <br/> string sendstr = "hello, the socket test! "; <Br/> byte [] sendbytes = encoding. ASCII. getbytes (sendstr + "[Final]"); <br/> sender. send (sendbytes); // (3) send data bit streams <br/> byte [] receivebytes = new byte [1024]; <br/> sender. receive (receivebytes); // (4) obtain the Server Response Data <br/> console. writeline ("received from server:" + encoding. ASCII. getstring (receivebytes); <br/> sender. shutdown (socketshutdown. both); // (5) disables sends and ES on a system. net. sockets. socket <br/> sender. close (); // (6) Close the socket connection and release all occupied resources <br/>}